Update system setting page subtext

- Move android version from about phone subtext to system update
- Updates strings for autofill, keyboard & input, factory reset, swipe
  for notification
- Add a new pref category for spell checker and personal dictionary
- Display "None" if any default app is not selected
- Display current keyboard type as language subtext

Bug: 36395109
Test: make RunSettingsRoboTests
Change-Id: Id6ca94ea31e55f1c1ec04e47dcf657a25c35c7fe

tests/robotests/src/com/android/settings/deviceinfo/SystemUpdatePreferenceControllerTest.java

@@ -16,21 +16,26 @@
 package com.android.settings.deviceinfo;
 
 import android.content.Context;
+import android.os.Build;
 import android.os.UserManager;
 import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceScreen;
+
 import com.android.settings.R;
 import com.android.settings.SettingsRobolectricTestRunner;
 import com.android.settings.TestConfig;
-import java.util.ArrayList;
-import java.util.List;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
+import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.Answers.RETURNS_DEEP_STUBS;
 import static org.mockito.Matchers.any;
@@ -91,6 +96,18 @@ public class SystemUpdatePreferenceControllerTest {
         verify(mScreen).removePreference(any(Preference.class));
     }
 
+    @Test
+    public void updateState_shouldSetToAndroidVersion() {
+        final Preference preference = new Preference(RuntimeEnvironment.application);
+        mController = new SystemUpdatePreferenceController(
+                RuntimeEnvironment.application, mUserManager);
+        mController.updateState(preference);
+
+        assertThat(preference.getSummary())
+                .isEqualTo(RuntimeEnvironment.application.getString(R.string.about_summary,
+                        Build.VERSION.RELEASE));
+    }
+
     @Test
     public void displayPrefs_oneAvailable_shouldDisplayOne() {
         final Preference preference = mock(Preference.class);